African-Americans were solidly behind Mark Green, with 75 percent going for the Democratic candidate, but he picked up only half the Hispanic vote, according to an exit poll last night.

Latino voters were split right down the middle, with 48 percent voting for Green and 48 percent lining up with his opponent, Michael Bloomberg.

That was unusual because Hispanics, like blacks, typically vote Democratic.

And while Green got seven out of 10 black votes, Bloomberg grabbed 22 percent – not a bad showing for a Republican, the poll found

Late yesterday, it appeared the coalition of black and Hispanic voters sparked by the failed candidacy of Bronx Borough President Freddy Ferrer had collapsed.

Many seemed opposed to the racially divisive campaigning against Ferrer that critics attributed to the Green camp.

“That’s the leftover rancor from a very tough runoff,” said pollster Maurice Carroll of Quinnipiac University.

Carroll said Bronx Democratic leader Roberto Ramirez’s eventual support for Green was tepid at best.

“They did not do a real push and yank-’em-out-to-vote operation that they are capable of. Sure, there are leftover bad feelings,” Carroll said.

The strong Latino showing for Bloomberg also likely was buoyed by his blanketing of the airwaves in certain communities with Spanish-language ads.

“He made a direct and involved bilingual appeal to Hispanic voters,” said Jeffrey Plaut, a pollster for Global Strategies.

And in the final days of the acrimonious campaign, Bloomberg’s camp released an ad depicting Democrats Rep. Nydia Velazquez, labor leader Dennis Rivera and Rep. Charles Rangel saying unflattering things about Green, giving the impression they had defected to Bloomberg.

All had actually endorsed Green.

“The excitement was for Freddy Ferrer [in the runoff], and after that, they [Latino voters] were up for grabs,” Plaut said.

The solid black vote for Green came as no surprise to many observers.

“Black voters are the most loyal Democrats there are. It’s the black vote that elects Democrats from the president on down,” Carroll said.

Plaut pointed out that Bloomberg positioning himself as the one to build on Mayor Giuliani’s policies probably didn’t endear him to black voters.

“The greatest antipathy toward Giuliani has been by black voters,” he said.